I've done it like this (not shown, this is not an ad). Have an image at the right bottom. People can click and only then the chat widget opens. This means very

I've done it like this (not shown, this is not an ad). Have an image at the right bottom. People can click and only then the chat widget opens. This means very fast loading of the page and only if people click on the widget there is contact with a third party server. I think it's the best of all ways. There is an easy way to contact for the visitor, but there is no in-your-face marketing technique used on potential customers.